Stakenburg M
Electroencephalogr Clin Neurophysiol. 1979 May;46(5):613-4. doi: 10.1016/0013-4694(79)90016-6.
A hammer equipped with a piezo-electric crystal is suitable to measure fast tendon jerk latencies more accurately than a hammer equipped with a mechanical switching device. Measurements show that the hammer supplied with a piezo-electric crystal gives a pulse within 50 musec--at least 10 times faster than hammers supplied with a mechanical switch--which is negligible in comparison with the latency of any reflex response.
配备压电晶体的锤子比配备机械开关装置的锤子更适合于更准确地测量快速肌腱反射潜伏期。测量结果表明，配备压电晶体的锤子能在50微秒内产生一个脉冲，这至少比配备机械开关的锤子快10倍，与任何反射反应的潜伏期相比可忽略不计。
